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Comet C/2025 K3 (PANSTARRS)

Above the horizon.  Circumpolar today
Alt: 74.46°   Az: 289.63°   Direction: West-North-West

C/2025 K3 (PANSTARRS) is a long-period comet discovered on May 23, 2025. It follows a highly inclined (105°) parabolic orbit, reaching perihelion at 3.46 Astronomical Units (between the orbits of Mars and Jupiter) on Dec 13, 2029. It's estimated to be magnitude 14-15 from Nov 2028 to May 2029.

Comet C/2025 K3 (PANSTARRS) is in the constellation of Cygnus, at a distance of 1,555,680,122.0 kilometers from Earth. The current Right Ascension is 19h 11m 10s and the Declination is +54° 04’ 53” (apparent coordinates). The predicted magnitude of Comet C/2025 K3 (PANSTARRS) is 21.57 (data provided by JPL Horizons).

Finder Charts

Map showing Comet C/2025 K3 (PANSTARRS) in Cygnus on June, 10 2025. Field of view: 50x30 degrees
View interactive star map
Sky map showing Comet C/2025 K3 (PANSTARRS) in Cygnus on June, 10 2025. Field of view: 15x9 degrees. View in interactive sky chart

High precision deep sky finder chart, 60 arcmin wide, showing where Comet C/2025 K3 (PANSTARRS) is right now. Click on the image to see a more detailed fullscreen tracker view.

C/2025 K3 (PANSTARRS)
RA: 19h 10m 36s
Dec: +54° 02’ 18”
Deep sky finder chart for Comet C/2025 K3 (PANSTARRS). Field of view: 60x40 arcmins. View in deep sky object tracker

Also check out Where is Comet C/2025 K3 (PANSTARRS)?, a page that provides all the information needed to find Comet C/2025 K3 (PANSTARRS) in the sky and additional links to sky charts.

Celestial Coordinates

Apparent

19h 11m 10s
+54° 04’ 53”
01h 41m 55s
20h 53m 05s

J2000

19h 10m 36s
+54° 02’ 18”

Additional Information

Cygnus
n/a
n/a
n/a
n/a
21.57

The observed values of Magnitude, Coma Diameter and Tail Length are derived from the most recent observation recorded at the Comet Observers Database. The value of Predicted Magnitude comes from the JPL Horizons ephemerides service and, in the case of comets, might be inaccurate given the highly dynamic and unpredictable behavior of these objects. When available, please refer to the Observed Magnitude value and consider the Predicted Magnitude as a directional indication. We acknowledge with thanks the comet observations from the COBS Comet Observation Database contributed by observers worldwide and used in this table to report recent comet observations.

Rise and Set Times

Today's rise, transit and set times of Comet C/2025 K3 (PANSTARRS) from Greenwich, UK (all times relative to the local timezone Europe/London):

Today Comet C/2025 K3 (PANSTARRS) is circumpolar and transits at 01:56 UTC reaching a maximum altitude of 87.4°.
  • C/2025 K3 (PANSTARRS) is above the horizon from Greenwich, UK.
  • Right now it is placed in the West-North-West direction at an altitude of 74.46° above the horizon.
  • Given its current magnitude, C/2025 K3 (PANSTARRS) is visible only through long exposure photography.
  • Go to interactive sky chart

If you need to access this information frequently for your observations, you can create a simple customized Quick Access page, so that you can easily bookmark it in your browser favorites or add a shortcut to your mobile phones' home screen.

Distance from Earth

The distance of Comet C/2025 K3 (PANSTARRS) from Earth is currently 1,555,680,122.0 kilometers, equivalent to 10.3990793099 Astronomical Units. Light takes 1h 26m 29.190s to travel from Comet C/2025 K3 (PANSTARRS) and arrive to us.

1,555,680,122.0
10.3990793099
1h 26m 29.190s

The following chart shows the distance of Comet C/2025 K3 (PANSTARRS) from Earth as a function of time. In the chart the distance data is measured in Astronomical Units and sampled with an interval of 1 day.

Chart of the distance of Comet C/2025 K3 (PANSTARRS) from Earth in Astronomical Units (au)

The value of the reported distance might be somewhat inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of C/2025 K3 (PANSTARRS) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest Approach

Between 1 January 2000 and 31 December 2099, the closest approach of Comet C/2025 K3 (PANSTARRS) to Earth happens on Sat Feb 24 2029 at a distance of 2.662618 Astronomical Units, or 398,321,936 kilometers:

Sat Feb 24 2029
398,321,936
2.662618

NOTE: values for the closest approach are computed with a sampling interval of 1 day.

Light Curve

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2025 K3 (PANSTARRS), according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.

Chart of the magnitude of Comet C/2025 K3 (PANSTARRS) as a function of time

Orbital Elements

The following table lists the orbital elements of Comet C/2025 K3 (PANSTARRS) at epoch 23 May 2025 00:00 UTC (JD: 2460819.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 1.00192653
Orbit inclination i 104.93709744°
Perihelion distance q 3.46406931 AU
518,217,394 km
Aphelion distance Q n.a.
Semi-major axis a n.a.
Orbital period period n.a.
Date of perihelion transit Tp 2028-Dec-13 00:37:42
2,462,118.5262 JD
Argument of perihelion peri 188.63799361401°
Longitude of the ascending node node 350.63472081823°
Mean anomaly M -0.016792085775767°
Mean motion n 0.00001293°/day
2h1>Orbit Visualization
Orbit Diagram of Comet C/2025 K3 (PANSTARRS)
View Comet C/2025 K3 (PANSTARRS) in the 3D Solar System Simulator

15 Days Ephemeris

The following table lists the ephemerides of Comet C/2025 K3 (PANSTARRS) computed for the past and next 7 days, with a 24 hours interval. Apparent celestial coordinates are provided.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2025 Jun 03 19h 15m 57s +53° 40’ 42” 21.60 Cygnus
2025 Jun 04 19h 15m 19s +53° 44’ 20” 21.60 Cygnus
2025 Jun 05 19h 14m 40s +53° 47’ 54” 21.59 Cygnus
2025 Jun 06 19h 14m 00s +53° 51’ 23” 21.59 Cygnus
2025 Jun 07 19h 13m 19s +53° 54’ 46” 21.58 Cygnus
2025 Jun 08 19h 12m 39s +53° 58’ 05” 21.58 Cygnus
2025 Jun 09 19h 11m 58s +54° 01’ 17” 21.58 Cygnus
2025 Jun 10 19h 11m 16s +54° 04’ 25” 21.57 Cygnus
2025 Jun 11 19h 10m 34s +54° 07’ 27” 21.57 Cygnus
2025 Jun 12 19h 09m 52s +54° 10’ 24” 21.56 Cygnus
2025 Jun 13 19h 09m 09s +54° 13’ 14” 21.56 Cygnus
2025 Jun 14 19h 08m 25s +54° 15’ 59” 21.55 Cygnus
2025 Jun 15 19h 07m 40s +54° 18’ 37” 21.55 Draco
2025 Jun 16 19h 06m 56s +54° 21’ 11” 21.55 Draco

Additional Resources on TheSkyLive